That's cute. My niece is 11 months and she still crawls like that. She got really efficient at it and never switched to up on her hands and knees. She's quick too, much faster than you'd think you could move in that position! My daughter, on the other hand, is trying to bypass the crawling and just walk. She's been crawling for awhile, but mostly just to get to something that she can use to pull up and then walk holding on. She just learned how to stand up on her own, so now I'm really in trouble since she tips over more than ever when she's not holding on. If only they could stay 3 months forever!